#include<stdio.h>;
int main()
{
	printf("hello my friends\n");

	int n = 10;
	printf("%d\n",n);

	const char q[] = "1000";
	printf("%s\n",q);

	const char p[] = { '1' };
	printf("%c\n", p[0]);

	printf("abcd\n\0efg");
	printf("abcd\ne\0fg");
	printf("abcd\nefg");

	return 0;
}